| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 25°F | 17°F | 0.5" |
| February | 12°F | 27°F | 19°F | 0.7" |
| March | 26°F | 42°F | 33°F | 1.9" |
| April | 38°F | 57°F | 46°F | 3.6" |
| May | 49°F | 69°F | 58°F | 4.3" |
| June | 59°F | 78°F | 67°F | 4.7" |
| July | 62°F | 81°F | 71°F | 2.9" |
| August | 60°F | 79°F | 69°F | 2.9" |
| September | 53°F | 73°F | 62°F | 4.0" |
| October | 41°F | 60°F | 49°F | 3.1" |
| November | 29°F | 45°F | 36°F | 1.4" |
| December | 16°F | 29°F | 22°F | 1.4" |
| Index | Ostrander | Minnesota | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 1,320,050 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 313 |
| Days with moderate air quality | 51 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Meyer, IA | 13 | 15 | 70.0% |
| McIntire, IA | 80 | 15 | 70.0% |
| Lime Springs, IA | 627 | 36 | 28.0% |
| Adams, MN | 820 | 36 | 28.0% |
| Le Roy, MN | 1,006 | 36 | 28.0% |
| Ostrander, MN | 288 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Gilmore, AR | 288 | 45 | 10.0% |
| Derby Acres, CA | 288 | 67 | 34.0% |
| Little Creek, DE | 288 | 42 | 16.0% |
| Cecil, GA | 288 | 35 | 30.0% |
| Palmer, IL | 288 | 40 | 20.0% |
| Ostrander, MN | 288 | 36 | 28.0% |
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